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go-micro/config/reader/preprocessor.go
2019-05-30 23:11:13 +01:00

24 lines
416 B
Go

package reader
import (
"os"
"regexp"
)
func ReplaceEnvVars(raw []byte) ([]byte, error) {
re := regexp.MustCompile(`\$\{([A-Za-z0-9_]+)\}`)
if re.Match(raw) {
dataS := string(raw)
res := re.ReplaceAllStringFunc(dataS, replaceEnvVars)
return []byte(res), nil
} else {
return raw, nil
}
}
func replaceEnvVars(element string) string {
v := element[2 : len(element)-1]
el := os.Getenv(v)
return el
}